PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/07/13-14:58:00
G01     94.7           30.6               11.6 +/-    0.67      20.0 +/-    0.67  0.030 / 0.040
G07     121.7          49.0               11.4 +/-    0.72      14.5 +/-    0.72  0.030 / 0.030
G08     42.0           10.4               10.5 +/-    1.76      28.9 +/-    1.76  0.090 / 0.110
G11     72.9           40.9               11.9 +/-    0.53      17.1 +/-    0.53  0.100 / 0.130
G13     298.8          34.7                9.5 +/-    0.86      15.2 +/-    0.86  0.040 / 0.070
G17     211.8          49.3               13.2 +/-    1.08      16.7 +/-    1.08  0.050 / 0.090
G18     67.6           24.4                9.9 +/-    0.81      19.7 +/-    0.81  0.030 / 0.050
G19     213.2          20.9               13.1 +/-    1.56      28.2 +/-    1.56  0.030 / 0.060
G28     341.0          61.9               10.0 +/-    0.90      11.2 +/-    0.90  0.040 / 0.060
G30     84.9           79.0               12.2 +/-    0.57      12.4 +/-    0.57  0.040 / 0.050